422 



ARTIlROrODA 



the ant lions (fig. 467') recall the dragon flics; the Chrysopina?, the rcrlida\ The 

 Xcuroptcra, howc\-cr, arc holometabolous ami ha\e a resting stage, although 

 the pup;e ipupcr libcra-'i arc capable of some motion. 



Sub Order I. rL.WirKXXl.V. Biting mouth parts. Sulid.k, wings 

 well developed, larva> aipialic. CoryJalis:'' hellgrammiie (fig. 4t>S~); Sialis.'^ 

 HeuerOBIID.e, lace wings; wings well develoiu-d; larva- with sucking mouth 

 parts, predaceous. Chrvsi'pa''' feeds on plant lice; M vriiu-lco* ant lions (hg. 

 467); larvK dig pits and'cainure ants, etc., which fall into them. Rxxorpidje 



Fig. 46S. — Coryjjlis toniuhis* hellgraininitc, male U'rom Riley). 



(Mecoptera); mouth prolonged into a rostrum; Billiuiis/" Sub Order II. TRI- 

 CHOPTKR.V (caddis Hies). Wings usually large; mouth parts rudinienlarv, 

 forming a short sucking lube which, with the wings covered with hair-liko scales 

 recalls the Lepidoptera; larvx acpiatic with tracheal gills; build cases of foreign 

 matter, stones, sticks, etc., in which they li\elike a hermit crab, riirvi^aiwa,'^ 

 Hydropsyilic/'' 



Order V. Strepsiptera. 

 Stylopid.e are parasitic on lIynieno]nera. The six-legged larva- (fig. 460, 

 3) press in between the \entral abdominal plates of bees or wasps and pupate 



